Scheduled weekly dependency update for week 23

[pyup-bot]

Update fonttools from 3.41.2 to 3.42.0.

Changelog

3.42.0

----------------------------

- [OS/2] Fixed sign of ``fsType``: it should be ``uint16``, not ``int16`` (1619).
- [subset] Skip out-of-range class values in mark attachment (1478).
- [fontBuilder] Add an empty ``DSIG`` table with ``setupDummyDSIG`` method (1621).
- [varLib.merger] Fixed bug whereby ``GDEF.GlyphClassDef`` were being dropped
when generating instance via ``varLib.mutator`` (1614).
- [varLib] Added command-line options ``-v`` and ``-q`` to configure logging (1613).
- [subset] Update font extents in head table (1612).
- [subset] Make --retain-gids truncate empty glyphs after the last non-empty glyph
(1611).
- [requirements] Updated ``unicodedata2`` backport for Unicode 12.0.

Links

• PyPI: https://pypi.org/project/fonttools
• Changelog: https://pyup.io/changelogs/fonttools/
• Repo: http://github.com/fonttools/fonttools

[pyup-bot]

Closing this in favor of #243